A computer expert from Maryland who filmed himself having sex with 12-year-old Filipina girls has been sentenced to 25 years.

Martin Hall, aged 56, of Reisterstown, was sentenced yesterday (Friday, October 12) for travelling to the Philippines to “engage in illicit sexual conduct with a minor” and “producing child pornography with intent to take it back to the US”.

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The judge also ordered Hall to pay $125,000 in restitution to the victims. Upon his release from prison, Hall must register as a sex offender.

According to court documents, Hall pleaded guilty to travelling to the Philippines with the intention of having sex with underage girls.

He first began visiting the country in 2006 to have sex with a 16-year-old girl. Later, in 2014, he “engaged in sexually explicit conduct” and produced images of two 12-year-old girls. Then, from April to August 2016, Hall travelled to the Philippines to have sex with one of these girl who was then aged 14.

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In all these cases, he documented the abuse and took the images back to the US.

He also downloaded and stored thousands of images and videos of child abuse, including his self-produced material. He used encryption software on all his devices.

Baltimore County Police obtained a search warrant and searched Hall’s home in September, 2016.

The investigators took his computer equipment and digital camera, and at the time of the execution of the warrant, Hall’s laptop and external hard drive were turned on and not encrypted.

They discovered around 8,000 images relating to child exploitation. The device became encrypted during the examination, but investigators copied more than 4,600 files, most of which were child pornography.

Hall operated coreservelts.com and provided instruction around the world as one of the world’s leading Java EE instructors.

Hall was a part-time faculty instructor atJohns Hopkins and has taught at UMBC, Loyola College, the University of Michigan, the University of Philippines and various private companies. Some of these institutions provided glowing endorsements of his skills, which he posted on LinkedIn.